Fan wheel



Dec. 25, 1923. 1,478,909 R. W. OSWALD FAN WHEEL.

Filed Aug. 24. 1921 2 Sheets-Shet 1 v gmmm 1Z- flJ aid Dec. 25 {1923.

' R. w. OSWALD FAN WHEEL v Filed Aug. 24'. 1921 2 Sheets- Sheet 2Patented Dec. 25, 1923.

UNITED STATES RICHARD W. OSWALD, or SEWICKLEY, PENNSYLVANIA.

FAN WHEEL.

Application filed August 24,1921. Serial No. 494,825.

To all whom it may concern:

Be it known that I, RICHARD W. OSWALD,

a citizen of the United States, residing at.

Sewickley, in the county of Allegheny and State of Pennsylvania, haveinvented a new and useful Fan Wheel, of which the following is aspecification.

The device forming the subject matter of this application is a. fanwheel, and one object of the invention is to provide a fan wheel whereinthe constitutent parts need not be tied together by rods, spiders,webplates, and the like, in order to keep the vanes or blades in position.

Another object of the invention is so to construct the wheel that,tapering the laterally projecting blades or vanes, the wheel will be ofgreatest diameter at the median plane of the wheel, the wheel being oflesser diameter at its ends, the result being that the wheel ha atendency to draw the air toward the center of the fan. i

It is within the province of the disclosure to improve generally vand toenhance the utility of devices of that type to which the inventionappertains.

lVith the above and other objects in View, which will appear as thedescription proceeds, the invention resides in the combination andarrangement of parts and in the details of construction hereinafterdescribed and claimed, it being understood that, within, the scope ofwhat i claimed, changes in the precise embodiment of the invention showncan be made without departing from the spirit of the invention.

In the accompanying drawings Figure 1 shows in elevation, a wheelconstructed in accordance with the invention;

Figure 2 is a cross section of the wheel; Figure 3 is a fragmental crosssection Showing a modification; Figure 4: is a fragmental cross sectionshowing a further modification; and Figure 5 is a sectional detailshowing another modification.

Referring to the wheel as shown in Figures 1 and 2, t-here'is provided abody 1 in the form of a disk, located between hub parts 2, the hub parts2 being attached to the body 1 by securing elements 3. The hub parts 2are mounted on a shaft '4. Laterally, projecting blades or vanes 5 areprovided, the same being supplied with inner flanges 6 and with outerflange 7. The inner flanges '6 abut against the body 1 and are connectedthereto by securing elements 8. A ring 9. is connected to theflanges 7by the securing elements 10. As shown at 11, the blades taper from theirinner ends toward their outer ends, the blades being widest adjacent tothe body 1 and being of less width adjacent to their outer ends. As aconsequence of the foregoing, the wheel is of great-est the body 1 andis of lesser diameter adjacent to its ends, that is, adjacent to theouter ends of the blades 5. The wheel, constructed as above described,has a tendency to draw the air to the center 0f.the wheel, since thevelocity or rim speed is greater adjacent to the median plane of thewheel than at its ends. The general makeup of the wheel is such that itwill have the requisite strength without resorting to tie rods and otherelements of a like sort, commonly used in the making of fan wheels.

In Figure 1 of the drawings, the blades 5 are shown as being straight,whereas. in Figure 5, the blades 5 are dished slightly, the body of thewheel appearing at l, and the inner flanges being designated by the numeral 6". I

In Figure 4, the body appears at ,1" and the ring at 9*, the numeral 5denoting one of the blades. In this form of the invention, the inneredge 25 of the blade 5? is disposed at right angle to the body 1*, allof the taper being in the outer edge 26 of the blade 5*. I

In Figure 3, parts hereinbefore described have been designated bynumerals previously, with the suflix c. In this form of the invention,the outer edge 28 of the blade is at right angles to the body 1, all ofthe taper being in the inner edge 29 of the blade. This form of theinvention does not possess the advantages of the other forms. but it maybe resorted to if desired.

What is claimed is A fan wheel comprising a body and blades diameter inalinement with projecting laterally from the body in oppositedirections, the outer edges of the blades being inclined, from the body,toward the axis of rotation of the Wheel, thereby to 5 render the Wheelof greater external diameter at its median plane than at its ends.

In testimony that I claim the foregoing as my oWn,.I have hereto aflixedmy signature in the presence of two Witnesses.

RICHARD W. OSWALD.

Witnesses S. E. GREEN, F. H. CzARNUoK.

